Circular knitting machine, particularly of the medium-diameter type, with improved needle actuation
a knitting machine and circular technology, applied in knitting, textiles and papermaking, climate sustainability, etc., can solve the problems of increasing even considerably the complexity, increasing the height of the needle cylinder, and penalizing the quality of the product, and achieve the effect of simple needle actuation system
Active Publication Date: 2008-07-01
SANTONI SPA
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Benefits of technology
The present invention provides a circular knitting machine with a simple needle actuation system that allows for high production levels and the ability to perform new types of knitting without needing to change the machine's settings. The machine has a needle cylinder with axial slots and sub-needles that can move along the slots to form knitting with yarn. The sub-needle can move from an active position to an inactive position to avoid engaging with actuation cams and can be acted on to transition between the two positions. This design allows for faster needle movement and higher production rates.
Problems solved by technology
However, this need clashes with an equally important need, which is versatility, i.e., the possibility to produce on a same machine various kinds of knitting process, the execution of which often entails increasing even considerably the complexity of the needle actuation system, increasing the space occupation entailed by the installation of several accessories around the needle cylinder, which inevitably force an increase in the height of the needle cylinder, which in practice constitutes the only dimensional variable that allows design freedom.
This engagement with the lowering cams produces unwanted movements of the needle, and if the needle is holding previously formed knitting these movements can alter or even break the stitches, inevitably penalizing the quality of the product.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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[0019]With reference to the figures, the circular knitting machine according to the invention, generally designated by the reference numeral 1 and shown only partially and schematically, comprises, like known types of machine, a footing, which is not illustrated for the sake of simplicity and supports a needle cylinder 2, which can rotate, with respect to the footing, about its own axis 2a, which is orientated substantially vertically. Multiple axial slots 3 are formed on the outer lateral surface of the needle cylinder 2 and each slot accommodates a needle 4.
[0020]The machine comprises means for actuating the needles 4, which are described in greater detail hereinafter and interact with the needles 4 during the rotation of the needle cylinder 2 about its own axis 2a in order to actuate the needles 4 along the corresponding axial slot 3 so that the needles 4 form knitting with at least one yarn, which is dispensed to the needles 4 at at least one feed or drop 5, which is arranged la...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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A circular knitting machine, comprising a footing with a rotatable, vertical needle cylinder, axial slots on the outer lateral surface of the needle cylinder, that accommodate each a needle, a sub-needle arranged below each needle in a corresponding axial slot connected bilaterally to the needle and having a radial heel, the sub-needle being oscillatable on a radial plane of the needle cylinder, sub-needle actuation cams, for producing movement of the sub-needle along the axial slot to actuate the overlying needle.
Description
TECHNICAL FIELD[0001]The present invention relates to a circular knitting machine, particularly of the medium-diameter type, with improved needle actuation.BACKGROUND ART[0002]The field of circular knitting machine has always felt the need to reduce as much as possible the height of the needle cylinder so as to reduce its inertia, in order to be able to increase its rotation rate and therefore increase correspondingly the productivity of these machines.[0003]However, this need clashes with an equally important need, which is versatility, i.e., the possibility to produce on a same machine various kinds of knitting process, the execution of which often entails increasing even considerably the complexity of the needle actuation system, increasing the space occupation entailed by the installation of several accessories around the needle cylinder, which inevitably force an increase in the height of the needle cylinder, which in practice constitutes the only dimensional variable that allo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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IPC IPC(8): D04B9/00D04B15/68
CPCD04B15/32D04B15/68D04B9/36D04B9/38D04B15/14Y02P70/62D04B15/66
InventorLONATI, ETTORELONATI, FAUSTOLONATI, TIBERIO
OwnerSANTONI SPA